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Optimal Cancellation of Frequency-Selective Cosite Interference

Maxson, Ben David
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1037292192

Abstract Details

2002, MS, University of Cincinnati, Engineering : Electrical Engineering.
As the demand for higher throughput has increased the operating bandwidths of communications systems, the effectiveness of traditional interference cancellation techniques has been diminished. Next-generation wideband military radio communications hardware will necessitate development of novel algorithms and architectures to provide cancellation of frequency-selective cosite interference under strict complexity constraints. This thesis represents the culmination of preliminary research into the feasibility of such a canceller. For a given signal bandwidth, channel transfer function, and number of filter taps, one important metric is the best possible cancellation. Calculation of the optimal tap weights and corresponding cancellation for a given set of tap delays is straightforward. However, finding the optimal delay for each tap is a more difficult non-linear optimization problem which sometimes involves a problematic error surface. Brute force searches of the tap delay space were performed to lend insight into the nature of the solution. Two sub-optimal algorithms were investigated that trade performance with computational complexity: the Multiple Model (MM) method and an echo-cancellation technique called Scrub Taps Waiting in a Queue (STWQ). A comprehensive MATLAB program was developed to simulate these algorithms and to investigate other aspects of a digital canceller, including quantization effects and performance in time-varying channels. A number of these simulation results are presented and interpreted. Finally, the results of the simulation are analyzed and directions for future research presented.
Dr. James Caffery, Jr. (Advisor)
adaptive filter; noise cancellation; cosite; interference cancellation

Recommended Citations

Citations

  • Maxson, B. D. (2002). Optimal Cancellation of Frequency-Selective Cosite Interference [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1037292192

    APA Style (7th edition)

  • Maxson, Ben. Optimal Cancellation of Frequency-Selective Cosite Interference. 2002. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1037292192.

    MLA Style (8th edition)

  • Maxson, Ben. "Optimal Cancellation of Frequency-Selective Cosite Interference." Master's thesis, University of Cincinnati, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1037292192

    Chicago Manual of Style (17th edition)

ucin1037292192
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© 2002, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.